* Jeremy Harris via Exim-dev:
>> Alternatively, I guess I could capture a coredump somehow, but that
>> might prove difficult as well due to the use of setuid etc.
>
> Yup. The /proc setuid-dump things. One to set the dumpability,
> one to set the filename. And also, ulimit -c.
Thanks. This is the backtrace:
#0 retry_add_item (addr=addr@entry=0x0,
key=0x55f7e124fba0 "T:mx03.t-online.de:194.25.134.73", flags=flags@entry=3)
at retry.c:298
#1 0x55f7e0277362 in smtp_transport_entry (tblock=0x55f7e124d630,
addrlist=0x55f7e124ee08) at smtp.c:4121
#2 0x55f7e01fda0c in do_remote_deliveries (fallback=fallback@entry=0)
at deliver.c:4655
#3 0x55f7e02026f5 in deliver_message (
id=0x7ffecfa358d3 "1iDwv6-iH-FV", forced=,
give_up=) at deliver.c:7014
#4 0x55f7e01ea661 in main (argc=, cargv=0x7ffecfa346a8)
at exim.c:4659
It looks like first_addr is NULL in smtp_transport_entry, so I assume
PREPARE_ADDRESSES return NULL. addr_list points to:
$1 = {next = 0x0, parent = 0x0, first = 0x0, dupof = 0x0, start_router = 0x0,
router = 0x55f7e124b3f0, transport = 0x55f7e124d630,
host_list = 0x55f7e124f6c0, host_used = 0x55f7e124f6c0,
fallback_hosts = 0x0, reply = 0x0, retries = 0x55f7e124fa90,
address = 0x55f7e124e738 "@t-online.de",
unique = 0x55f7e124efa8 "@t-online.de",
cc_local_part = 0x55f7e124efd8 "",
lc_local_part = 0x55f7e124efe8 "",
local_part = 0x55f7e124efe8 "", prefix = 0x0, suffix = 0x0,
domain = 0x55f7e124efc8 "t-online.de",
address_retry_key = 0x55f7e124f008 "R:@t-online.de",
domain_retry_key = 0x55f7e124eff8 "R:t-online.de", current_dir = 0x0,
home_dir = 0x0,
message = 0x55f7e124f9d0 "SMTP error from remote mail server after initial
connection: 554 IP=37.24.231.21 - A problem occurred. (Ask your postmaster for
help or to contact t...@rx.t-online.de to clarify.) (BL)", user_message = 0x0,
onetime_parent = 0x0, pipe_expandn = 0x0, return_filename = 0x0,
self_hostname = 0x0, shadow_message = 0x0, cipher = 0x0, ourcert = 0x0,
peercert = 0x0, peerdn = 0x0, ocsp = 0, authenticator = 0x0, auth_id = 0x0,
auth_sndr = 0x0, dsn_orcpt = 0x0, dsn_flags = 0, dsn_aware = 0,
uid = 4294967295, gid = 4294967295, flags = 33554432, domain_cache = {15},
localpart_cache = {0}, mode = -1, more_errno = 77, basic_errno = 0,
child_count = 0, return_file = -1, special_action = 0, transport_return = 2,
prop = {address_data = 0x0, domain_data = 0x0, localpart_data = 0x0,
errors_address = 0x0, extra_headers = 0x0, remove_headers = 0x0}}
transport_return == 2 (FAIL?) is consistent with a NULL return value
from prepare_addresses.
Not sure if this relevant, but there is an expired database entry:
27-Sep-2019 20:32:52 27-Sep-2019 20:56:11 27-Sep-2019 21:11:11
T:mx03.t-online.de:194.25.134.73 111 77 Connection refused
Since this is with Exim 4.89 in Debian, I went through the commit log,
and found this:
commit e69636bc9ddf3617be688b07941d7d659d50eaa7
Author: Jeremy Harris
Date: Sat Jun 3 13:39:18 2017 +0100
Fix crash in transport, on second smtp-connect fail for a list of target
hosts
Reported as the sequence:
1MX: 554 on connect (banner)
2MX: TCP conn timeout
Could this be relevant?
I can probably upgrade to the latest Debian version and see if the
issue goes away.
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